Commission Regulation (EU) No 142/2011Show full title

C. High pressure hydrolysis biogas process U.K.

1. Starting material U.K.

For this process, animal by-products of all categories may be used.

2. Processing method U.K.

The high pressure hydrolysis biogas process shall be carried out according to the following processing standards:

(a)

The animal by-products must be first processed using processing method 1 (pressure sterilisation) as set out in Chapter III in an approved processing plant;

(b)

Following the process referred to in point (a), the defatted materials must be treated at a temperature of at least 220 °C for at least 20 minutes at a pressure (absolute) of at least 25 bar, heated in a two-step procedure, first by direct steam injection, secondly indirect in a coaxial heat exchanger;

(c)

The process must be carried out in a batch or continuous system and the material is constantly mixed;

(d)

The animal by-products must be treated in such a manner that the requirements regarding time, temperature and pressure are achieved at the same time;

(e)

The resulting material must then be mixed with water and anaerobically fermented (biogas transformation) in a biogas reactor;

(f)

In the case of starting material of Category 1, the entire process must take place on the same site and in a closed system and the biogas produced during the process must be combusted rapidly in the same plant at a minimum of 900 °C followed by rapid chilling (‘quenching’).